- Nov 21, 2001
the difference in molecular weight of CO to air is minimal and it readily mixes with air and does not disperse upward. I deal with this in my line of work. My experience with automobile fumes laden with CO is that they do tend to settle. I work in confined spaces from time to time, and I have been chased up out of a structure in the ground that has filled up with CO and set off my alarm.CO is lighter than air and CO2 heavier. You would have to be in an inclosed space to be be CO poisoned or inclosed or at the bottom of a depression to be poisoned byCO2 seems to me. Don’t know where the bodies were found but if out in the open either gas doesn’t make sense to me. What in Yosemite would be a killing source of either that could get you while hiking.
it is more readily detected in autopsies, however. That is what is puzzling about this case. If they died of CO poisoning it would be found in the blood and tissues. Simple hypoxia is not easy to detect.